James Clarke of Devlis Cottage in Ballyhaunis, had more than 135,000 images and videos on his computer included involving shots of bondage, cruelty and bestiality.
Judge Patricia Ryan was due to sentence Mr. Clarke today but she has put the case back until January in line with the recommendation of a psychological report that he should undergo further evaluation.
He remains in custody.
Sexual activity with animals
Along with admitting possession the 58-year-old pleaded guilty to 4 counts of knowingly distributing child pornography at an address in Tallaght, Dublin in August 2010.
He not only had one of the largest collections of child porn ever found by Gardaí it included images of infants and children engaging in sexual activity with each other, adults and animals.
The court heard Clarke was also using an e-mail account to speak to a woman about keeping her and her 14-year-old daughter as sex slaves.
He has a previous conviction for sex with a minor in 1977.